Spark-plug



A. GATES.

SPARK PLUG.

APPLICATION man APR.15,1919.

1,337,2 1 6. Patented Apr. 20, 1920.

ABBAM GATES, OF CARROLL COUNTY, NEAR BURNETTS CREEK, INDIANA.

SPARK-PLUG.

Application filed April 15,

To aZZ whom it may concern:

Be it known that I, Arman GATES, a ci.-- zen of the United States of America, residing in the county of Carroll near Burnetts Creek, State of Indiana, have invented certain new and useful Improvements in Spark Plugs, of which the following is aspecification, reference being had therein to the accompanying drawing.

The invention relates to spark plugs and has for its object to provide a spark plug especially adapted for use in internal combustion en ines, also to so construct the plug that the electrodes will be protected from carbon deposits caused by the combustion of gases in the combustion chamberof internal combustion engines, and also free from oil.

A. further object of the invention is to provide a spark plug mounted in a body member, said body member being provided with a downwardly extending ogival shaped housing arching over the electrode, said housing being provided with diametrically disposed elongated slots the upper ends of which are at an obtuse angle to the vertical center line of the spark plug and to provide the lower end of the chamber of the housing with a convexed upwardly extending surface, which surface forms one of the arcing points for the current.

A further object is to provide a spark plug wherein the electrodes are covered with an ogival shaped housing, said housing being provided with a chamber having an upwardly extending convexed lug, said convex lug allowing the initial explosion to pass downwardly into the combustion chamber of the engine and radially through vertical slots in the housing and to angle the upper ends of said slots, whereby the initial explosion will be allowed to pass through the slots and into engagement with the upper end and surface of the cylinder, thereby getting the maximum ignition at the upper end of the cylinder.

l/Vith the above and other objects in view, the invention resides in the combination and arrangement of parts as hereinafter set forth,'shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is Specification of Letters Patent.

. Patented Apr. 20, 1%?20.

1919. Serial No. 290,130.

claimed without departing from the spirit of the invention.

In the'drawings:

Figure 1 is a perspective view of the spark plug.

Fig. 2 is aside elevation of the same.

Fig. 3 is a vertical sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a vertical sectional view taken at right angle to Fig-3 and showing the lock nut and body portion in section.

Fig. 5 is a sectional horizontal view through the housing, taken on line 5-5 of Fi 2.

ideferring to the drawings the numeral 1 designates the body of the spark plug, which comprises the hexagonal shaped portion 2 adapted to receive a wrench when the plug is being screwed into the cylinder of an internal combustion engine and the integral downwardly extending ogival shaped housing 3 having a chamber 4 therein of the same shape as the outer surface of the housing. The portion 1 of the body member is provided with an internally threaded opening 5, in the bottom of which opening a copper washer 0 is disposed. Vertically and centrally disposed in the opening 5 is a cylindrirally shaped porcelain member 7, which is provided with an annular flange 8 adapted to rest upon the copper-washer (3, this flange being of less diameter than the opening lelcscopically fitting the porcelain member 7 and threaded into the opening 5 is a lock nut 9 having a hexagonal flange 10 for the reception of a wrench, whereby the flange 8 may be forced into close engagement with th'c copper washer The lower end of the lock nut 9 being provided with an annular channel 11, which receives the upper edge of the flange 8, which channel ll insures the centrally positimling of the porcelain nicnibcr T. llmbcdded'in the porcelain member is an electrode 12, the lower end oli which extends downwardly through the lower tapered end 13 of the member T and is disposed over and in a near position to a convex upwardly extending lug 13, which forms the other electrode. The upper end of the electrode 12 tern'iinates in a binding post 14; for the reception of a. wire through which electric energy is carried to the electrode 12. The wall of the housing 3 is provided with vertically disposed elongated openings 15, which openings are preferably ciainetrically arranged. Each openinn; extends from the eonvexed surlaee of the lug l3 and has its upper ends heveled as at 16, which beveled surfaces 16 allow the flashes from the electrodes to pass upwardly into engagement with the upper surface of the engine cylinder well as radially, as the lashes pass throngh the elongated ogenings 15. The outer surface of the housing is provided with threads 17, which are adapted to he threaded into a. cylinder of an engine, these threads being so positioned tl at the will tit various kinds of engines.

By forming the housing ogii'al shaped it will he seen that the maximum oi length is obtained for the elongated slots ii, therefore the maximum ot ellieiency, at the same time it will he seen that when the charge is exploded in the combustion chamber, the ogival shape of the housing between 'th slots will protect the electrodes hem collecting var on. The convex apex ot the llOllSZilZ protevts the (let-trodes from the bottom, thereby preven ing; the entrance of carbon on the same. 'll gival shape also presents a sui'i'are that is oi such a shapethat earhon will not easily eollect on the same, and one wherein carbon that may eoileet on the same, will be easily dislodged, by the force ol the sueeeeding explosions.

The convex lug 113, which forms one of the electrodes pr sents a wide 'ange with whieh the end of the electrode 12 may be adjusted. it is common in spark plugs for the porcelain to not he true in shape, especially the flange 8 thereof. When this happens to he the case, the setting up on the not i will cause the lower end of the electrode 12, to be forced out of aerial alinenient with the body member 1, conse p1ently out of vertical registration with the electrode carried hf, the hody member. in the coin struetion of the kind shown this is not possihle, nor is the exact alinernent of the electrode 12 essential, for the reason that the eonvex surface of the lag 13 will allow the areing from any point on its surface. The convened surface of the lug also allows the flash from the electrodes extend radially downwardly, thereby allowing the flashes to reach the combustion charge at the sides of the eylinder.

The invention having l.'- set is claimed as new and u.)

A spark plug comprising a easing, said easing having an ogi. 'al shaped housing at its lower end, said housing having an ogiva shaped chamber therein, an insulated eleciaving its trode disposed in said casing and lower end in said ogival eh: vexed upwardlvextending end of the housing chamber electrode ada p d to end named ele in the 4 ends of Stilt vexed surface o forming downw:

L n the lower ends of the slot snbstai. V l tieally disposed so that the flash w l the chamber radially in a horizontal p and downwardly in a substantially vertical plane and the upper ends of the slots ternit hating above the arcing points of the e eotrodes i In testimony \i'hereo't' l hereunto al'iix my signature.

AB R AM GATES. 

